KR100531434B1 - Device for supplying parts and flanging method using this - Google Patents

Abstract

The present invention relates to a material supply device and a flange forming method using the same, and more particularly, to improve the process of forming a flange by supplying the material by pressing, to reduce the material, improve productivity and minimize the manufacturing cost and personnel It relates to a material supply apparatus that can be and a flange forming method using the same.

Accordingly, the present invention, in the material supply device for supplying the plate-like material (3) to the press (5) to form a product, a plurality of rollers 11 at the top to support the one side of the material (3) to be transportable Roller stand 10 is installed; A rail 20 having a predetermined length spaced apart from the roller stand 10 and installed on the floor; A material transfer table 30 installed with the rail 20 in a forward and backward direction, wherein the material 3 is seated at an upper end thereof, and a rack 32 is installed at a lower end thereof in a longitudinal direction; Position setting means 40 is installed to set the material (3) seated on the material transporting table 30 to the correct position; It characterized in that it comprises a drive means 90 is installed on the floor to have a pinion 92 engaged with the rack 32 to move the material transfer table 30 by a predetermined pitch.

Description

Device for supplying parts and flanging method using this}

The present invention relates to a material supply device and a flange forming method using the same, and more particularly, to improve the process of forming a flange by supplying the material by pressing, to reduce the material, improve productivity and minimize the manufacturing cost and personnel It relates to a material supply apparatus that can be and a flange forming method using the same.

In general, the flange is used to connect the pipe, such as connecting the pipes through which the fluid moves through the inside, as a whole has a cylindrical pipe shape.

In the conventional method of forming such a flange, first, a thick iron sheet is cut into gas to the required size, and then blanked by a press to obtain a disc-shaped semifinished product.

Then, the central portion of the disc-shaped semifinished product obtained in the disc shape is press-processed again to form a ring-shaped semifinished product.

Thereafter, the ring-shaped semi-finished product is cut to the upper or lower and inner and outer circumferential circumferences according to a predetermined dimension to complete machining of the flange.

After the ring-shaped flange is manufactured through the above process, drilling and reaming of a plurality of bolt fastening holes is performed to complete the processing of the flange. It is possible to make a joint like this.

However, as described above, in order to form a flange, a thick iron plate is gas-cut to match the size of the flange, and then a disk-shaped semi-finished product is formed by press work, wherein the gas-cut iron plate is cut larger than the flange size for processing tolerance. As a result, waste of material was very much generated.

In addition, there was a problem that the material waste of about 5mm occurs even when gas cutting the iron plate.

In addition, after gas cutting of the iron plate, a number of workers have to work to supply the cut iron plate to the press.

An object of the present invention for solving the above problems is to improve the process of forming the flange (semi-finished product) by supplying the material to the press to reduce the material, improve productivity and minimize the manufacturing cost and personnel To provide a material supply device and a flange forming method using the same.

The present invention for achieving the above object is a material supply device for supplying a plate-like material to the press so as to form a product, comprising: a roller stand provided with a plurality of rollers on the upper end so as to support one side of the material to be transported; A rail having a predetermined length spaced apart from the roller stand and installed on the floor; A material transport stand installed forward and backward along the rails, the material seated at an upper end thereof, and a rack installed in a longitudinal direction at a lower end thereof; Position setting means is installed to set the material seated on the material transport table to the correct position; It characterized in that it comprises a drive means installed on the floor having a pinion engaged with the rack coupled to move the material transfer table by a predetermined pitch.

In addition, the first exact position setting step of positioning the material seated on the upper end of the material carrier to be installed forward, backward along the rail; A first blanking step of cutting the unnecessary material remaining while simultaneously feeding the material between the die and the punch of the press while transferring the material conveying table having passed the first exact position setting step by a predetermined pitch; A second exact position setting step of setting a material in which the one-line work is completed through the first blanking step for the next work but performing the next blanking work between the pre-worked blanking surfaces; While transferring the material transfer stage after the second in-situ setting step by a certain pitch step by inserting the material between the die and the punch of the press to obtain the flange shape between the blanking surface of the pre-work and at the same time to cut off the unnecessary material And a second blanking step, wherein the second in-position setting step and the second blanking step are sequentially repeated until the work of one material is completed to obtain a flange from the material in a zigzag form.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

Repeated descriptions of the same parts as in the prior art are omitted.

1 is an overall perspective view showing a material supply apparatus according to the present invention, Figure 2 is a cross-sectional view taken along the line AA in Figure 1, Figure 3 is a cross-sectional view taken along the line BB in Figure 1, Figures 4a to 4e is a raw material according to the present invention Fig. 5 is a schematic diagram showing an operation process of the supply device, and Fig. 5 is a view showing a process of forming a flange (semi-finished product) from a material using the material supply device according to the present invention.

As shown, the material supply apparatus 1 according to the present invention is a device for supplying a material between the die 5a and the punch 5b of the press 5, which press 5 is used to form a flange. Since the raw material 3 supplied from the supply apparatus 1 is disc shaped and it is known as an apparatus which shape | molds the disk-shaped semifinished product 4, detailed description is abbreviate | omitted here.

The material supply apparatus 1 is largely composed of a roller stand 10, a rail 20, a material feed table 30, a position setting means 40, a drive means 90.

First, the roller stand 10 is composed of a plurality of frames 12, the skeleton is installed in a predetermined length and height in the direction toward the die 5a and the punch (5b) of the press 5 and at the top Rollers 11 are installed at regular intervals.

The roller 11 is to support the one side of the material (3) protruding from the material carrier (30) for transport so that the material (3) is seated on the material carrier 30 to be described below.

The rail 20 is spaced apart from the roller stand 10 and installed at a predetermined length on the floor.

Here, the rail 20 is to be installed along the roller stand 10, it is located on the front side of the press (5).

On the other hand, the roller stand 10 and the rail 20 is preferably installed on the top of the base frame 2 installed on the bottom.

In addition, the material transfer table 30 is installed to be capable of moving forward and backward along the rail 20, and includes a body 31 formed of a plurality of frames, and the material 3 is seated on an upper end of the body 31. And the bottom 32 is provided with a rack 32 in the longitudinal direction.

Here, a wheel 34 having support jaws 34a on both sides is installed at the lower end of the body 31 so as to slide along the rail 20 and not to be separated from the rail 20.

Therefore, the material transfer table 30 can be slid forward and backward along the rail 20 at the front side of the roller stand 10 by the wheel 34.

In addition, a plurality of rollers 33 are installed at the upper end of the body 31 of the material carrier 30 in the lateral direction toward the roller stand 10, and then the material 3 is seated on the body 31. By the position setting means 40 to be described later to allow the material (3) can be smoothly moved to the roller stage (10) side.

That is, the roller 33 prevents the friction between the material 3 and the material carrier 30 in the process of setting the exact position of the material 3 by the exact position setting means 40, so that the scratches of the material 3 and It will prevent noise.

In addition, the exact position setting means 40 is installed to set the material 3 seated on the material transport table 30 to the correct position, the correct position when the material 3 is supplied to the press 5 To be blanked in.

The exact position setting means 40 is a plurality of first and second stoppers (50a) (50b) and a plurality of first and second stoppers (50a) which are installed at regular intervals on one side of the upper end of the roller (10), the material (3) the first, 2 a stopper (50a) (50b) and the charging body 60 is installed on the upper end of the body 31 of the material transfer table 30 to be in close contact with the material transfer table 30 to fix both ends of the material (3) It consists of a clamp 70 is installed at the top of the.

First, the first and second stoppers 50a and 50b are provided with a support plate 59 extending on one side of the upper end of the roller stand 10 so that the support frame 51 is installed vertically on the top of the support plate 59. Guides 52 are formed on both front sides of the support frame 51 to protrude, and a cylinder 53 is coupled to an upper end of the support frame 51, and the cylinder rod 53a of the cylinder 53 has a cylinder. When the operation of the 53, the elevating plate 54 which is raised and lowered on the inner side of the guide 52 is coupled.

The stop plate 55 is coupled to the elevating plate 54 in a state spaced apart at a predetermined interval toward the front side, and the elevating plate 54 and the stop plate 55 are coupled to each other via the elastic member 56.

On the other hand, the stop plate 55 may be further provided with a sliding pin (58) which is slidably coupled to the elevating plate (54) while supporting the front and rear movable.

Here, the elastic member 56 is preferably a spring (56a), when the set position of the raw material 3, the stop plate 55 with the lifting plate 54 is lowered to the Operate to catch the end.

In addition, the elevating plate 54 is provided with a proximity sensor 57 for controlling the charging body (60).

That is, in order to set the exact position of the material 3 seated on the top of the body 31 of the material carrier 30, the charging body 60 is in close contact with the material 3 toward the stop plate 55, at this time The stop plate 55 is moved to the rear side by a pressing force of the charging body 60, and the proximity sensor 57 detects the movement distance at this time to drive the charging body 60. ) To stop the material (3) in place.

Meanwhile, the first and second stoppers 50a and 50b have the same structure, but the front and rear installation positions are different and operate separately.

That is, during the initial blanking operation of the material 3 with the press 5, only the stop plate 55 of the first stopper 50a is lowered to perform the blanking operation in a state in which the material 3 is positioned. When the first one-line blanking operation of the material 3 is completed, the blanking operation is performed by positioning the material 3 while only descending the stop plate 55 of the second stopper 50b.

Therefore, the first stopper 50a serves to adjust the distance from one end of the first supplied material 3 to the center of the blanking operation.

The second stopper (50b) is the raw material of the unnecessary portion remaining when the disc-shaped semi-finished product 4 is extracted from the material (3) during the first one-line blanking operation is the cutting edge of the press (not shown) As the cutting is made at the same time, it serves to match the distance from the cut surface at this time to the center of the portion where the next blanking operation is to be made.

Meanwhile, in the above description, the front and rear installation positions of the first and second stoppers 50a and 50b are different, but the first and second stoppers 50a and 50b may be installed at the same position. In this case, the stop plate 55 senses the distance to move to the rear side by controlling the motor 61 of the charging body 60, the specifications of the proximity sensor 57, each using a different product (3) It is preferable to position).

In addition, the charging body 60 is a motor 61 installed in the transverse direction on the upper end of the body 31 of the material transfer table 30, the chain 62 is coupled to the sprocket of the motor 61 and rotated, It is coupled to the chain 62 so as to protrude in the outward direction is composed of a projection piece 63 for conveying the material (3) in close contact with the first and second stoppers (50a, 50b) side.

It is preferable that at least two of the charging body 60 is installed on the material carrier 30, and is installed inside the cover plate 64 to protect the chain 62 or the like. At this time, it is natural that the protruding piece 63 protrudes from the cover plate 64.

In addition, the clamp 70 is a fixed clamp 81 for fixing one end of the material (3) seated on the upper end of the material carrier 30, and the other end of the material (3) is installed to be movable It consists of a moving clamp 71.

The fixing clamp 81 is provided with a "c" shaped fixing body 83 is fixed to the upper end of the body 31 of the material transfer table 30, the upper end of the fixed body 83 cylinder 84 Is installed, the inside of the fixed body 83 is coupled to the end of the cylinder rod penetrating the upper end of the fixed body 83 is composed of a fixed plate 85 for pressing / fixing the material (3) while lifting up and down. .

The movable clamp 71 couples the sliding plate 73 to the upper end of the body 31 of the material transfer table 30, and the sliding plate 73 is coupled to the moving cylinder 75 before and after the movement. A fixed body 74 having a "c" shape, and a cylinder 76 is installed at an upper end of the fixed body 74, and an upper end of the fixed body 74 is provided inside the fixed body 74. It is composed of a fixed plate 77 is coupled to the end of the cylinder rod penetrated to press / secure the raw material (3) while moving up and down.

Here, the fixed clamp 81 and the movable clamp 71 is preferably installed on the mounting plate 82, 72 provided on the upper end of the body 31 of the material transfer table (30).

Therefore, the exact position setting means 40 is any one of the stop plate 55 of the first and second stoppers 50a and 50b when the material 3 is seated on the upper end of the material carrier 30. Is lowered, and at this time, the motor 61 of the charging body 60 is operated to move the protruding piece 63 while the chain 62 rotates to bring the material 3 into close contact with the stop plate 55, Subsequently, the movable clamp 71 is operated to move the raw material 3 toward the fixed clamp 81 and to fix both ends of the raw material 3.

In this way, the two side surfaces of the material 3 are brought into close contact with the first and second stoppers 50a and 50b and the fixing clamp 81 side.

Next, the drive means 90 is composed of a servo motor 91 having a controller (not shown).

The servo motor 91 is provided with a pinion 92 engaged with the rack 32 installed at the lower end of the material carrier 30 to transfer the material carrier 30 along the rail 20 by a predetermined pitch. do.

On the other hand, the controller of the servo motor 91 is input the pitch value for transferring the material transfer table 30 for each flange size, the method for controlling the servo motor 91 as described above is a detailed description here. Is omitted.

In addition, the first and second limit switches 95a and 95b are installed at predetermined positions along the rail 20. The first limit switch 95a allows the material transfer table 30 to enter the press 5. It is installed in the previous position.

Accordingly, the material transfer table 30 having completed the exact position setting of the material 3 is quickly transferred to the place where the press 5 is positioned. In this case, when the material transfer table 30 comes into contact with the first limit switch 95a, The material transfer table is transferred by a predetermined pitch input to the controller of the servomotor 91.

In addition, the second limit switch (95b) is the material transfer table 30 advances a predetermined distance or more after the blanking operation of the press 5 for the material (3) is completed, the material transfer table 30 is returned to the origin again. So that the blanking work is completed.

Therefore, when the material transfer table 30 that has completed the blanking operation is advanced by a predetermined distance or more, the material transfer table 30 is brought into contact with the second limit switch 95b while receiving the signal at this time. Will quickly reverse.

Hereinafter, the operation of the material supply device 1 according to the present invention will be described.

First, when a predetermined size of the material (iron plate) 3 is seated on the upper end of the material transfer table 30, the stop plate 55 of the first stopper 50a is lowered, and the stop plate 55 is lowered. When the motor 61 of the charging body 60 is completed, the protruding piece 63 coupled to the chain 62 moves the material 3 toward the stop plate 55.

At this time, the material (3) is in close contact with the stop plate 55, the stop plate 55 starts to move to the rear side by the continuous operation of the motor 61 even after being in close contact, The proximity sensor 57 provided in the first stopper 50a is operated and the motor 61 receiving the signal of the proximity sensor 57 is stopped while one side of the material 3 is set in the correct position. do.

Thereafter, the movable cylinder 75 of the movable clamp 71 is operated to move the fixed body 74 of the "c" shape to move the material 3 in close contact with the fixed clamp 81. After the movement, the respective cylinders 76 and 84 installed on the top of the fixed body 74 and 83 of the movable clamp 71 and the fixed clamp 81 are operated to fix the material (3) to the fixed plates 77 and 85. Another side of the material 3 is set in place while fixing both ends of the substrate.

When the two side surfaces of the material 3 are set in the correct position, the chain 62 is rotated in reverse so that the protruding piece 63 is spaced apart from the material and the stop plate 55 is raised. The servo motor 91 is then operated to quickly advance the material transfer table 30 along the rail 20 to the place where the press 5 is located.

Here, a part of the material (3) is transported in a fixed state by the clamp 70 of the material carrier 30, but a part of the material (3) protruding outward from the material carrier 30 is the roller rod It is supplied between the die 5a of the press 5 and the punch 5b, sliding the roller 11 of (10).

On the other hand, if the material transfer table 30 is in contact with the first limit switch (95a) in the process of rapidly advancing along the rail 20 toward the press (5) side, it is paused just before the press (5) entry, after The servo motor 91 enters the press 5 by a predetermined pitch.

When the material 3 starts to be supplied between the die 5a of the press 5 and the punch 5b, the servo motor 91 gradually moves the material conveyance table 30 by a predetermined pitch input to the controller. In connection with this, the punch 5b of the press 5 is blanked while lowering the punch 5b of the press 5.

In the blanking operation of the press 5, the disc-shaped semifinished product 4 is extracted from the raw material 3, and at the same time, the unnecessary raw material 3 of the blanking portion is cut by the cutting blade descending together with the punch 5b.

When the blanking operation of one line is completed from the material 3, the material transfer table 30 is brought into contact with the second limit switch 95b while continuing to move forward, and receives a signal from the second limit switch 95b. The received servo motor 91 quickly returns the material transfer table 30 to the origin for the next operation.

Thereafter, the clamps 70, which are fixing both ends of the material 3, release the fixing and repeat the whole process again, from which time the second part is set for the exact position setting of the material 3. The stopper 50b is used.

That is, the second stopper 50b sets the workpiece 3 in position so that the next one-line blanking operation can be performed between the semicircular blanking surfaces 3a pre-worked by the first one-line blanking operation of the workpiece 3. In addition, the servo motor 91 also transfers the material transfer table 30 by a predetermined pitch so that punching of the press 5 can be performed between the lineworked semicircular blanking surfaces 3a.

Accordingly, the line-worked blanking surface 3a and the line-working blanking surface 3a to be worked on next are repeated in a zigzag fashion within a range that does not overlap each other.

As such, while the material 3 is set in position, the material conveying table 30 is transferred to the servo motor 91 by a predetermined pitch so that the surface 3a, which is lined with one line blanking through the press 5, is adjacent. As the disc-shaped semi-finished product 4 is extracted in a zigzag form as close as possible to the surface 3a, waste of the material 3 can be minimized, productivity can be improved, manufacturing cost can be reduced, and personnel can be minimized.

Next, a method of forming a flange using a material supply device according to the present invention,

The first exact position setting step (a), the first blanking step (b), the second exact position setting step (c), and the second blanking step (d).

end. 1st exact setting step,

By driving the servo motor 91, the material 3 is seated on the upper end of the material carrier 30 which is installed to be able to move forward and backward along the rail 20, and then the material is set using the exact position setting means 40. (3) is the step of positioning.

At this time, only the first stopper 50a of the first and second stoppers 50a and 50b is operated to set the home position.

I. Primary blanking step,

The material 3 is transferred to the die 5a and the punch 5b of the press 5 while gradually transferring the material transfer table 30 that has undergone the first exact position setting step (a) to the servo motor 91 by a predetermined pitch. ) And the unnecessary raw material 3 remaining at the same time as the flange (semi-finished semi-finished product) 4 is inserted into the shape and cut with the punch 5b.

In the first blanking step (b), a blanking operation is performed on the first supplied material 3, and after completion of the work, the material transfer table 30 is returned to the origin for the next operation.

All. 2nd exact setting step,

The first position blanking step (b) through the one-line work is completed for the next work is placed in place for the next work, but between the semi-circular blanking surface (3a) of the pre-working position setting means so as to be made Using 40 to position the material (3) in place.

At this time, only the second stopper 50b of the first and second stoppers 50a and 50b is operated to set an exact position.

la. Secondary blanking step,

The material 3 is transferred to the servo motor 91 stepwise by a predetermined pitch while the material transfer table 30 passed through the second exact position setting step (c) is die 5a and punch 5b of the press 5. And cutting the shape of the flange (semi-finished semi-finished product) 4 between the blanking surfaces 3a pre-injected and cutting the unnecessary material 4 remaining with the punch 5b with the cutting blade descending together with the punch 5b. to be.

Subsequently, the second exact position setting step (c) and the second blanking step (d) are repeatedly performed sequentially until the work of one material 3 is completed.

Therefore, the process of picking the disc-shaped semi-finished product 4 in a zigzag form from one material 3 in a row in a row can further reduce the material 3 and improve productivity.

According to the present invention, by supplying the material to the press to improve the process to form a flange (semi-finished semi-finished product) in a zigzag form line by line, it is possible to reduce the material, improve productivity, and reduce the manufacturing cost and minimize the number of people Can be.

1 is an overall perspective view showing a material supply apparatus according to the present invention,

2 is a cross-sectional view taken along the line A-A in FIG.

3 is a cross-sectional view taken along the line B-B in FIG.

4a to 4e are schematic views showing the operation of the material supply apparatus according to the present invention,

5 is a view showing a process of forming a flange (semi-finished semifinished product) from the material using the material supply device according to the present invention.

<Description of Signs of Major Parts of Drawings>

1: material feeder 2: base frame

3: material (iron plate) 3a: blanking surface

4: disc shaped semifinished product (flange) 5: press

5a: die 5b: punch

10: roller stand 11,33: roller

12: frame

20: rail 30: material carrier

31: body 32: rack

34: wheel 34a: support jaw

40: exact position setting means 50a: first stopper

50b: second stopper 51: support frame

52: guide 53,76,84: cylinder

54: lifting plate 55: stop plate

56: elastic member 56a: spring

57: proximity sensor 58: sliding pin

59: support plate 60: holder

61: motor 62: chain

63: protrusion 64: cover plate

70: clamp 71: moving clamp

72,82: Mounting plate 73: Sliding plate

74,83: fixed body 75: moving cylinder

77,85: fixed plate 81: fixed clamp

90: drive means 91: servo motor

92: pinion 95a: first limit switch

95b: second limit switch

Claims (9)

In the material supply apparatus for supplying the plate-like material (3) to the press (5) so that the product can be molded, A roller stage 10 having a plurality of rollers 11 installed at an upper end thereof so as to support one side of the material 3 in a transportable manner; A rail 20 having a predetermined length spaced apart from the roller stand 10 and installed on the floor; A material transfer table 30 installed with the rail 20 in a forward and backward direction, wherein the material 3 is seated at an upper end thereof, and a rack 32 is installed at a lower end thereof in a longitudinal direction; Position setting means 40 is installed to set the material (3) seated on the material transporting table 30 to the correct position; Drive means 90 having a pinion 92 engaged with the rack 32 and installed on the floor to move the material transfer table 30 by a predetermined pitch Material supply apparatus comprising a. The method of claim 1, The exact position setting means 40 is a plurality of first and second stoppers (50a) (50b) are installed at a predetermined interval spaced on one side of the upper end of the roller (10), A charging body 60 installed at an upper end of the material transfer table 30 to closely contact the material 3 with the first and second stoppers 50a and 50b; Material supply apparatus, characterized in that consisting of a clamp (70) which is installed on the upper end of the material transfer table (30) to fix both ends of the material (3). The method of claim 2, The first and second stoppers 50a and 50b may include a support frame 51 installed vertically on one side of the upper end of the roller stand 10, and guides 52 formed on both front sides of the support frame 51. And a cylinder 53 fixedly installed at an upper end of the support frame 51 and having a lifting plate 54 that moves up and down inside the guide 52, and spaced apart from the front of the lifting plate 54 by a predetermined distance. Stop plate 55 coupled to the elevating plate 54 and the elastic member 56 in the state and the elevating plate 54 is installed to detect the rear movement distance of the stop plate 55 Material supply apparatus, characterized in that each consisting of a proximity sensor (57) for controlling the charging body (60). The method of claim 2, The charging body 60 is a motor 61 installed in the transverse direction on the upper end of the material conveying table 30, the chain 62 is coupled to the motor 61 and rotated, and the chain 62 in the outward direction And a protruding piece (63) which is coupled so as to protrude from the material and closely adheres the material (3) to the first and second stoppers (50a) and (50b). The method of claim 2, The clamp 70 has a “c” shaped fixing body 83, a cylinder 84 installed at the upper end of the fixing body 83, and a cylinder passing through the upper end of the fixing body 83. A fixed clamp 81 composed of a fixed plate 85 coupled to an end of the rod to press / fix one end of the material 3; The cylinder 76 and the fixed body 74 having a fixed body 74 having a "c" shape coupled to the moving cylinder 75 so as to be movable forward and backward, and installed at the upper end of the fixed body 74. The material supply device, characterized in that made of a moving clamp (71) consisting of a fixed plate (77) for pressing / fixing the other end of the material (3) is coupled to the end of the cylinder rod penetrating the upper end. The method according to any one of claims 1 to 5, The driving means (90) is a material supply apparatus, characterized in that the servo motor (91). The method of claim 6, After setting the exact position of the material (3) at a predetermined position along the rail (20), the servo motor (91) to temporarily stop immediately before the press (5) to move the material carrier 30 along the rail (20) Second limit switch 95a for controlling the servo motor 91 to return to the home position when the first limit switch 95a for controlling the control center and the material transfer table 30 having completed the blanking operation are moved more than a predetermined distance. Material supply apparatus characterized in that the installation is further. The method according to any one of claims 1 to 5, A material supply, characterized in that the wheel 34 having the support jaw 34a on both sides is installed at the lower end of the material transfer table 30 so as to slide along the rail 20 and not to be separated from the rail 20. Device. (A) a first exact position setting step of precisely positioning the material 3 seated on the upper end of the material carrier 30 which is installed to be moved forward and backward along the rail 20; Flange shape by feeding the material 3 between the die 5a of the press 5 and the punch 5b while transferring the material transfer table 30 which has undergone the first exact position setting step (a) stepwise by a predetermined pitch A first blanking step (b) of cutting off the unnecessary raw material 3 remaining at the same time as picking it up; 2nd exact position setting for setting the next blanking operation between the blanking surface 3a which has been lined up for the next work while the work 3 where the one-line work is completed through the first blanking step (b) is performed. Step (c); Line work by feeding the material 3 between the die 5a of the press 5 and the punch 5b while gradually transferring the material transfer table 30 that has passed through the second exact position setting step (c) by a predetermined pitch. A secondary blanking step (d) which cuts out a flange shape between the blanking surfaces 3a and cuts unnecessary material remaining; It is made of, and the second in-position setting step (c) and the second blanking step (d) iteratively repeated until the completion of one work of the material (3) is characterized in that the flange from the material (3) in a zigzag form Flange forming method.